What files are usually files with a .jpg extension?

A file with the extension jpg is usually an image file. JPEG is the product of the JPEG standard, which was developed by the International Organization for Standardization (ISO) and is a compression standard for continuous-tone still images. JPEG format is the most commonly used image file format, with the suffix . jpg or. jpeg.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

A file with the extension jpg is usually an image file. JPEG is the product of the JPEG standard, which was developed by the International Organization for Standardization (ISO) and is a compression standard for continuous-tone still images. JPEG format is the most commonly used image file format, with the suffix . jpg or. jpeg.

JPEG performance, measured by the ratio of quality to bitrate, is quite superior.

Its advantages are:

It supports extremely high compression rates, so the download speed of JPEG images is greatly accelerated. It handles 16.8M colors with ease and reproduces full-color images very well.

This image format allows you to freely choose between the smallest file size (lowest image quality) and the largest file size (highest image quality) during the image compression process. The file size of this format is relatively small and the download speed is fast, which is conducive to transmission when the bandwidth is not "rich".

Extended information

JPEG format can be divided into three formats: standard JPEG, progressive JPEG and JPEG2000.

1. Standard JPEG format; this type can only display images from top to bottom when downloading a web page. Only when all image data is downloaded can the full image be seen.

2. Progressive JPEG; when downloading a web page, this type first presents a rough appearance of the image, and then slowly presents the complete content, and the document saved in the progressive JPG format is smaller than the document saved in the standard JPG format. , so if you want to use images on web pages, you can use this format more often.

3． JPEG2000; it is a new generation of image compression method with higher compression quality and can improve the quality of transmission by improving the mosaic phenomenon and positional confusion often caused by signal instability during wireless transmission.

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